AM_Ilvaite_13 Formula: Ca.98 Mn.74 Fe2.28 Si2 O9 H Name: Ilvaite Unit cell: 13.015 8.868 5.842 90.0 90.0 90.0 , V=674.27 Space group: PNAM (62)
Bonazzi P , Bindi L , American Mineralogist , 87 (2002) p.845-852, Structural properties and heat-induced oxidation-dehydrogenation of, manganoan ilvaite from perda Niedda mine, Sardinia, Italy, Sample: PN6-400, Crystal at room temperature, annealed at 400 C for 48 hrs